JP2531372B2 - Fault detection circuit - Google Patents

Fault detection circuit

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Publication number
JP2531372B2
JP2531372B2 JP5271154A JP27115493A JP2531372B2 JP 2531372 B2 JP2531372 B2 JP 2531372B2 JP 5271154 A JP5271154 A JP 5271154A JP 27115493 A JP27115493 A JP 27115493A JP 2531372 B2 JP2531372 B2 JP 2531372B2
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JP
Japan
Prior art keywords
circuit
signal
package
transmission
transmission signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP5271154A
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Japanese (ja)
Other versions
JPH07107055A (en
Inventor
聡 大橋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
Nippon Electric Co Ltd
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Filing date
Publication date
Application filed by Nippon Electric Co Ltd filed Critical Nippon Electric Co Ltd
Priority to JP5271154A priority Critical patent/JP2531372B2/en
Publication of JPH07107055A publication Critical patent/JPH07107055A/en
Application granted granted Critical
Publication of JP2531372B2 publication Critical patent/JP2531372B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】この発明は、ディジタルデータ等
を伝送する伝送装置に用いて好適な故障検出回路に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a failure detection circuit suitable for use in a transmission device for transmitting digital data or the like.

【０００２】[0002]

【従来の技術】従来より、この種の伝送装置において
は、装置内の信号伝送区間を被監視回路単位に監視する
ものとしている。すなわち、監視開始点の監視制御回路
により監視用制御信号を伝送信号に付加し、この監視用
制御信号の付加された伝送信号多段接続された被監視回
路へ未使用回線を使用して順次に送るものとし、この送
られてくる伝送信号に付加された監視用制御信号を各被
監視回路の通過後の各点（監視点）で監視することによ
って、故障検出を行うものとしている。この場合、上流
側の被監視回路が故障すると、下流側の全ての監視点に
おいて同時に故障検出が行われる。このため、従来にお
いては、故障評定による故障切り分け手順により、ソフ
トウェア的に伝送装置内の故障した被監視回路を特定す
るものとしている。2. Description of the Related Art Conventionally, in this type of transmission device, a signal transmission section in the device is monitored in units of monitored circuits. That is, the supervisory control circuit at the supervisory start point adds the supervisory control signal to the transmission signal, and the transmission signal to which this supervisory control signal is added is sequentially sent to the monitored circuit connected in multiple stages using an unused line. It is assumed that failure is detected by monitoring the monitoring control signal added to the transmitted transmission signal at each point (monitoring point) after passing through each monitored circuit. In this case, if the monitored circuit on the upstream side has a failure, the failure is simultaneously detected at all the monitoring points on the downstream side. For this reason, conventionally, a faulty monitored circuit in the transmission apparatus is specified by software by a fault isolation procedure based on a fault evaluation.

【０００３】[0003]

【発明が解決しようとする課題】しかしながら、このよ
うな従来の故障箇所の特定方法によると、監視点におい
て故障検出されている全ての被監視回路が故障評定の対
象となるため、故障した被監視回路の特定に時間がかか
るという問題があった。また、ソフトウェアで処理する
ため、正確さの点で問題があった。However, according to such a conventional method of identifying a fault location, all the monitored circuits whose faults have been detected at the monitoring points are subject to fault evaluation, so that the faulted monitored circuit is detected. There is a problem that it takes time to identify the circuit. Moreover, since it is processed by software, there was a problem in terms of accuracy.

【０００４】本発明はこのような課題を解決するために
なされたもので、その目的とするところは、故障した被
監視回路の特定を迅速かつ確実に行うことの可能な故障
検出回路を提供することにある。The present invention has been made to solve the above problems, and an object of the present invention is to provide a failure detection circuit capable of quickly and reliably identifying a failed monitored circuit. Especially.

【０００５】[0005]

【課題を解決するための手段】このような目的を達成す
るために、本発明は、伝送信号を入力する信号入力端子
（１−６）と、この信号入力端子に供給される伝送信号
を入力する第１のパッケージ（１）と、この第１のパッ
ケージから出力される伝送信号を入力する第２のパッケ
ージ（２）と、この第２のパッケージと同様に構成され
第２のパッケージから出力される伝送信号を入力して順
次伝送する複数のパッケージ群（ｎ）とからなる伝送シ
ステムの故障検出回路において、 In order to achieve such an object, the present invention provides a signal input terminal for inputting a transmission signal.
(1-6) and the transmission signal supplied to this signal input terminal
Input the first package (1) and this first package
The second package for inputting the transmission signal output from the cage
Package (2) and configured in the same way as this second package
Input the transmission signal output from the second package and input
A transmission system consisting of multiple package groups (n) to be transmitted next.
In the failure detection circuit of the stem,

【０００６】第１のパッケージには、信号入力端子から
周期的に入力される伝送信号に監視用制御信号を付加す
る監視制御回路（１−５）と、この監視制御用信号が付
加された伝送信号を入力して通過させる第１の被監視回
路（１−１）と、この第１の被監視回路から出力される
伝送信号からこれに付加されている監視制御用信号を抽
出し、この抽出した監視制御用信号に基づいて第１の被
監視回路の異常検出を行う一方、これによって第１の被
監視回路の異常を検出した場合、伝送信号のｋ周期分に
相当する故障検出保護時間の計時を開始し、この故障検
出保護時間に達してもまだ異常が検出される場合に初め
て第１の被監視回路の故障と判定する第１の監視回路
（１−２）と、第１の被監視回路から出力される伝送信
号を入力し、第１の監視回路で第１の被監視回路が故障
と判定された場合、次の周期の伝送信号からその伝送信
号に異常の生じた監視制御用信号に代えて正常な監視用
制御信号を付加して第２のパッケージに送出する第１の
再生回路（１−３）とを備え、 The first package has a signal input terminal
Add a control signal for monitoring to the cyclically input transmission signal
With a supervisory control circuit (1-5) and a supervisory control signal
First monitored circuit for inputting and transmitting the applied transmission signal
Path (1-1) and this first monitored circuit outputs
From the transmission signal, the monitoring control signal added to this is extracted.
Based on the extracted supervisory control signal.
While detecting the abnormality of the monitoring circuit, the first target
When an abnormality of the monitoring circuit is detected, the signal is transmitted in k cycles
Start time measurement of the corresponding failure detection protection time, and
Initially when abnormality is still detected even after the protection time is reached.
First monitoring circuit for determining that the first monitored circuit has failed
(1-2) and transmission transmitted from the first monitored circuit
Signal is input and the first monitored circuit fails in the first monitored circuit
If it is determined, the transmission is transmitted from the transmission signal of the next cycle.
For normal monitoring instead of the signal for monitoring control in which an error has occurred
A first signal to which a control signal is added and which is sent to the second package
A reproduction circuit (1-3),

【０００７】第２のパッケージには、第１のパッケージ
からの伝送信号を入力して通過させる第２の被監視回路
（２−１）と、この第２の被監視回路から出力される伝
送信号からこれに付加されている監視制御用信号を抽出
し、この抽出した監視制御用信号に基づいて第２の被監
視回路の異常検出を行う一方、これによって第２の被監
視回路の異常を検出した場合、伝送信号のｋ＋１周期分
に相当する故障検出保護時間の計時を開始し、この故障
検出保護時間に達してもまだ異常が検出される場合に初
めて第２の被監視回路の故障と判定する第２の監視回路
（２−２）と、第２の被監視回路から出力される伝送信
号を入力し、第２の監視回路で第２の被 監視回路が故障
と判定された場合、次の周期の伝送信号からその伝送信
号に異常の生じた監視制御用信号に代えて正常な監視用
制御信号を付加して下流のパッケージに送出する第２の
再生回路（２−３）とを備え、複数のパッケージ群は下
流になる程そのパッケージにおける故障検出保護時間が
伝送信号の１周期分長く設定されているものである。 The second package includes the first package
Second monitored circuit for inputting and transmitting a transmission signal from the circuit
(2-1) and the transmission output from the second monitored circuit.
Extracts the supervisory control signal added to this from the transmission number
Then, based on the extracted supervisory control signal, the second monitored
While detecting abnormalities in the visual circuit, this allows the second monitored
When an abnormality of the visual circuit is detected, k + 1 cycles of the transmission signal
This starts the clocking of the failure detection protection time corresponding to
If an abnormality is still detected even after the detection protection time is reached,
Second monitoring circuit for determining that the second monitored circuit is faulty
(2-2) and transmission output from the second monitored circuit
Signal is input and the second monitored circuit fails in the second monitored circuit.
If it is determined, the transmission is transmitted from the transmission signal of the next cycle.
For normal monitoring instead of the signal for monitoring control in which an error has occurred
The second which adds a control signal and sends it to the downstream package
A reproducing circuit (2-3) and a plurality of package groups
The more time it becomes, the more time the fault detection protection time in the package will be.
The transmission signal is set longer by one cycle.

【０００８】[0008]

【作用】したがってこの発明によれば、第１のパッケー
ジにおいて、信号入力端子から周期的に入力される伝送
信号に監視用制御信号が付加され、この監視制御用信号
が付加された伝送信号が第１の被監視回路へ与えられ
る。そして、この第１の被監視回路を通過した後の伝送
信号からこれに付加されている監視制御用信号が抽出さ
れ、この抽出された監視制御用信号に基づいて第１の被
監視回路の異常検出が行われる。この際、第１の被監視
回路の異常が検出されると、伝送信号のｋ周期分（例え
ば、３周期分）に相当する故障検出保護時間の計時が開
始され、この故障検出保護時間に達してもまだ異常が検
出されれば、第１の被監視回路の故障と判定される。第
１の被監視回路が故障と判定された場合、第２のパッケ
ージへ送られる第１の被監視回路通過後の伝送信号に
は、次の周期の伝送信号から異常の生じた監視制御用信
号に代えて正常な監視用制御信号が付加される。 Therefore, according to the present invention, the first package
Transmission that is periodically input from the signal input terminal
The supervisory control signal is added to the signal, and this supervisory control signal
The transmission signal added with is given to the first monitored circuit.
It Then, the transmission after passing through the first monitored circuit
The signal for supervisory control added to this is extracted from the signal.
Based on the extracted supervisory control signal.
Abnormality detection of the monitoring circuit is performed. At this time, the first monitored
When a circuit abnormality is detected, k cycles of the transmission signal (for example,
For example, the time for failure detection protection time corresponding to 3 cycles) is opened.
Even if this failure detection protection time is reached, no abnormality is detected.
If issued, it is determined that the first monitored circuit has failed. First
If the monitored circuit of No. 1 is determined to be defective, the second package of
The transmission signal after passing through the first monitored circuit sent to the
Is the supervisory control signal that is abnormal from the transmission signal of the next cycle.
A normal monitoring control signal is added instead of the signal .

【０００９】また、第２のパッケージにおいて、第１の
パッケージからの伝送信号が第２の被監視回路へ与えら
れる。そして、この第２の被監視回路を通過した後の伝
送信号からこれに付加されている監視制御用信号が抽出
され、この抽出された監視制御用信号に基づいて第２の
被監視回路の異常検出が行われる。この際、第２の被監
視回路の異常が検出されると、伝送信号のｋ＋１周期分
（例えば、４周期分）に相当する故障検出保護時間の計
時が開始され、この故障検出保護時間に達してもまだ異
常が検出されれば、第２の被監視回路の故障と判定され
る。第２の被監視回路が故障と判定された場合、下流の
パッケージへ送られる第２の被監視回路通過後の伝送信
号には、次の周期の伝送信号から異常の生じた監視制御
用信号に代えて正常な監視用制御信号が付加される。 In the second package, the first package
The transmission signal from the package is applied to the second monitored circuit.
It is. Then, the transmission after passing through this second monitored circuit
The signal for supervisory control added to this is extracted from the transmission number
Then, the second signal is generated based on the extracted supervisory control signal.
The abnormality of the monitored circuit is detected. At this time, the second
When an abnormality of the visual circuit is detected, k + 1 cycles of the transmission signal
(For example, for 4 cycles) Total of failure detection protection time
Time has started and the fault detection protection time has
If normal is detected, it is determined that the second monitored circuit has failed.
It If it is determined that the second monitored circuit has a failure,
Transmission after passing through the second monitored circuit sent to the package
No. 1 is the supervisory control for which an abnormality has occurred from the transmission signal of the next cycle.
The normal monitoring control signal is added in place of the monitoring signal.

【００１０】[0010]

【実施例】以下、本発明を実施例に基づき詳細に説明す
る。図１はこの発明の一実施例を適用してなる伝送装置
の要部を示すブロック回路構成図である。 EXAMPLES The present invention will be described in detail below based on examples.
It FIG. 1 is a transmission device to which an embodiment of the present invention is applied.
3 is a block circuit configuration diagram showing a main part of FIG.

【００１１】同図において、１〜ｎは多段接続されたパ
ッケージであり、パッケージ１は被監視回路１−１と監
視回路１−２と再生回路１−３と監視制御回路１−５と
を備え、パッケージ２〜ｎは被監視回路２−１〜ｎ−１
と監視回路２−２〜ｎ−２と再生回路２−３〜ｎ−３と
を備えている。 In the figure, 1 to n are connected in multiple stages.
Package 1 and package 1 and monitored circuit 1-1.
The visual circuit 1-2, the reproduction circuit 1-3, the monitoring control circuit 1-5,
And the packages 2 to n are the monitored circuits 2-1 to n-1.
And monitoring circuits 2-2 to n-2 and reproducing circuits 2-3 to n-3.
Is equipped with.

【００１２】パッケージ１において、監視制御回路１−
５は、信号入力端子１−６より周期的に入力される伝送
信号に監視制御用信号を付加する機能を有している。ま
た、パッケージ１〜ｎにおいて、監視回路１−２〜ｎ−
２は、被監視回路１−１〜ｎ−１を通過した後の伝送信
号からこれに付加されている監視制御用信号を抽出し、
この抽出した監視制御用信号に基づいて被監視回路１−
１〜ｎ−１の異常検出を行う機能を有している。 [0012] In the package 1, the monitoring control circuit 1
5 is transmission that is periodically input from the signal input terminals 1-6
It has a function of adding a supervisory control signal to the signal. Ma
Further, in the packages 1 to n, the monitoring circuits 1-2 to n-
2 is transmission after passing through the monitored circuits 1-1 to n-1
The signal for supervisory control added to this is extracted from the
Based on the extracted supervisory control signal, the monitored circuit 1-
It has a function of detecting abnormality of 1 to n-1.

【００１３】また、監視回路１−２〜ｎ−２は、被監視
回路１−１〜ｎ−１の異常を検出した場合、各個にその
故障検出保護時間（故障と判定するための猶予時間）を
スタートする機能を有し、監視回路１−２は保護ｋ段
（例えば、伝送信号の３周期分に相当する時間）、監視
回路２−２は保護ｋ＋１段（伝送信号の４周期分に相当
する時間）、・・・、監視回路ｎ−２は保護ｋ＋ｎ段
（伝送信号の３＋ｎ周期分に相当する時間）というよう
に、下流側へ行く程その監視回路の故障検出保護時間が
長く設定され、この故障検出保護時間に達してもまだ異
常が検出される場合に初めて被監視回路１−１〜ｎ−１
の故障と判定する機能を有している。 The monitoring circuits 1-2 to n-2 are to be monitored.
If an abnormality is detected in each of the circuits 1-1 to n-1,
Failure detection protection time (grace time for judging failure)
It has a function to start, and the monitoring circuit 1-2 has protection k stages
(For example, the time corresponding to three cycles of the transmission signal), monitoring
Circuit 2-2 is protection k + 1 stage (corresponding to 4 cycles of transmission signal)
Monitor circuit n-2 is protected k + n stages
(Time corresponding to 3 + n cycles of transmission signal)
To, is between the time of fault detection and protection of the monitoring circuit extent to go to the downstream side
It will be set long and will still be different when this fault detection protection time is reached.
Only when the constant is detected, the monitored circuits 1-1 to n-1
It has a function to determine that the failure occurs.

【００１４】また、パッケージ１〜ｎにおいて、再生回
路１−３〜ｎ−３は、監視回路１−２〜ｎ−２により被
監視回路１−１〜１−ｎが故障と判定された場合、下流
側へ送られる被監視回路１−１〜１−ｎを通過後の次の
周期の伝送信号からその伝送 信号に異常の生じた監視制
御用信号に代えて正常な監視用制御信号を付加する機能
を有している。 Further , in the packages 1 to n, the reproduction times are
The paths 1-3 to n-3 are covered by the monitoring circuits 1-2 to n-2.
If it is determined that the monitoring circuits 1-1 to 1-n have failed, the downstream
Next, after passing through the monitored circuits 1-1 to 1-n sent to the
Monitoring system for abnormal transmission signal from periodic transmission signal
Function to add normal monitoring control signal instead of control signal
have.

【００１５】この伝送装置において、故障検出および故
障箇所の特定は、次のようにして行われる。信号入力端
子１−６へ周期的に伝送信号を与える。この伝送信号は
パッケージ１の監視制御回路１−５へ与えられる。監視
制御回路１−５は、入力される伝送信号に監視制御用信
号を付加し、被監視回路１−１へ与える。被監視回路１
−１を通過した伝送信号は監視回路１−２および再生回
路１−３へ与えられる。監視回路１−２は、被監視回路
１−１を通過した後の伝送信号からこれに付加されてい
る監視制御用信号を抽出し、この抽出した監視制御用信
号に基づいて被監視回路１−１の異常検出を行う。 In this transmission device, failure detection and failure
The failure location is specified as follows. Signal input terminal
A transmission signal is periodically given to the child 1-6. This transmitted signal is
It is given to the supervisory control circuit 1-5 of the package 1. Surveillance
The control circuit 1-5 receives the supervisory control signal from the input transmission signal.
Signal is added to the monitored circuit 1-1. Monitored circuit 1
The transmitted signal that has passed through -1 is the monitoring circuit 1-2 and the reproduction circuit.
Routes 1-3 will be given. Monitoring circuits 1-2, the monitoring circuit
It is added to the transmission signal after passing through 1-1.
Monitor and control signals, and the extracted monitor and control signals.
The abnormality of the monitored circuit 1-1 is detected based on the signal.

【００１６】ここで、被監視回路１−１が正常である場
合には、被監視回路１−１からの伝送信号が再生回路１
−３を通過し、下流側のパッケージ２の被監視回路２−
１へ与えられる。これに対し、監視回路１−２にて被監
視回路１−１が故障と判定された場合には、その故障判
定結果が出力端子（故障検出結果出力端子）１−４より
出力されると共に、再生回路１−３が起動され、この再
生回路１−３を通過する次の伝送信号からその伝送信号
に異常の生じた監視用制御信号に代えて正常な監視用制
御信号が付加される。以下、パッケージ１の場合と同様
にして、パッケージ２〜ｎにおいても同様の故障検出動
作が行われる。これにより、上流側パッケージにて発生
した故障情報の下流側パッケージへの波及を無くし、よ
り確実に故障箇所の特定を行うことが可能となる。If the monitored circuit 1-1 is normal,
In this case, the transmission signal from the monitored circuit 1-1 is the reproduction circuit 1
-3, and the monitored circuit 2 of the package 2 on the downstream side 2-
Given to 1. On the other hand, it is monitored by the monitoring circuit 1-2.
If the visual circuit 1-1 is determined to be in failure, the failure determination is made.
From the output terminal (fault detection result output terminal) 1-4
At the same time as the output, the reproduction circuit 1-3 is activated,
From the next transmission signal passing through the raw circuit 1-3 to the transmission signal
Normal monitoring control instead of the monitoring control signal
A control signal is added. Below, the same as for Package 1
Then, in the packages 2 to n, the same failure detection
The work is done. As a result, the failure information generated in the upstream package can be prevented from being transmitted to the downstream package, and the failure location can be identified more reliably.

【００１７】すなわち、例えば、パッケージ１において
その故障検出保護時間に達した後（３周期目）でもまだ
伝送信号に異常が生じれば、監視回路１−２において被
監視回路１−１の故障と判定される。この場合、再生回
路１−３によって、次の周期（４周期目）の伝送信号か
らその伝送信号に正常な監視用制御信号が付加される。
ここで、異常の生じている３周期目の伝送信号は、パッ
ケージ２へ送られる。この際、パッケージ２における故
障検出保護時間がパッケージ１のそれと等しいものとす
れば、異常の生じている上記３周期目の伝送信号を受け
て、パッケージ２の監視回路２−２は被監視回路２−１
の故障と判定してしまう。That is, for example, if an abnormality still occurs in the transmission signal in the package 1 even after the failure detection protection time has been reached (the third cycle), it is determined that the monitored circuit 1-1 has failed in the monitoring circuit 1-2. To be judged. In this case, the reproduction circuit 1-3, the normal monitoring control signal is pressurized with its transmission signal from the transmission signal of the next period (fourth period).
Here, the transmission signal of the third cycle in which the abnormality has occurred is sent to the package 2. At this time, assuming that the failure detection protection time in the package 2 is equal to that in the package 1, the monitoring circuit 2-2 of the package 2 receives the transmission signal of the above-described third cycle in which an abnormality has occurred, and the monitoring circuit 2-2 of the package 2 -1
It will be judged as a failure.

【００１８】これに対して、本実施例によれば、パッケ
ージ２における故障検出保護時間がパッケージ１のそれ
よりも伝送信号の１周期分長く設定されているので、異
常の生じている上記３周期目の伝送信号を受けても、パ
ッケージ２の監視回路２−２が被監視回路２−１の故障
と誤判定してしまうことがない。すなわち、本実施例で
は、下流側へ行く程そのパッケージにおける故障検出保
護時間が伝送信号の１周期分長く設定されているので、
上流側で生じた伝送信号の異常を自己のパッケージにお
ける被監視回路の故障と誤って判定することがない。On the other hand, according to the present embodiment, since the failure detection protection time in the package 2 is set longer than that in the package 1 by one cycle of the transmission signal, the above-mentioned three cycles in which an abnormality occurs. Even if the eye transmission signal is received, the monitoring circuit 2-2 of the package 2 does not erroneously determine that the monitored circuit 2-1 is in failure. That is, in this embodiment, the fault detection protection time in the package is set to be longer by one cycle of the transmission signal as it goes downstream.
An abnormality of a transmission signal generated on the upstream side will not be erroneously determined as a failure of a monitored circuit in its own package.

【００１９】以上説明したように、本実施例によれば、
上流側の被監視回路が故障しても、下流側にはその故障
検出保護時間内に正常な監視用制御信号の付加された伝
送信号が与えられるようになるため、下流側の全ての監
視回路において同時に故障が検出されてしまうというこ
とがなくなる。また、本実施例によれば、パッケージ１
〜ｎ毎に独立して被監視回路１−１〜ｎ−１の故障検出
が行われ、監視回路１−２〜ｎ−２での監視結果が出力
端子１−４〜ｎ−４より出力されるので、故障した被監
視回路を瞬時に特定することができるようになる。すな
わち、本実施例によれば、ソフトウェアではなく、ハー
ドウェアにより、伝送装置内の故障した被監視回路の特
定を迅速かつ確実に行うことができる。 As described above, according to this embodiment,
Even if the monitored circuit on the upstream side fails, the failure on the downstream side
Transmission with a normal monitoring control signal added within the detection protection time.
Since the transmission number will be given, all supervisors on the downstream side will be given.
The failure is detected in the visual circuit at the same time.
Disappears. Further, according to the present embodiment, the package 1
~ N independent failure detection of monitored circuits 1-1 to n-1
Is performed and the monitoring results of the monitoring circuits 1-2 to n-2 are output.
Since it is output from terminals 1-4 to n-4,
The visual circuit can be specified instantaneously. sand
That is, according to this embodiment, it is not software but hardware.
Hardware to identify the faulty monitored circuit in the transmitter.
The setting can be performed quickly and reliably.

【００２０】[0020]

【発明の効果】以上説明したことから明らかなように本
発明によれば、上流側の被監視回路が故障しても、下流
側にはその故障検出保護時間内に正常な監視用制御信号
の付加された伝送信号が与えられるようになり、下流側
の全ての監視回路において同時に故障が検出されてしま
うということがなくなり、故障した被監視回路の特定を
迅速かつ確実に行うことが可能となる。 As is apparent from the above description, the book
According to the invention, even if the monitored circuit on the upstream side fails,
The normal control signal for monitoring within the failure detection protection time
The transmission signal with the addition of
Failures are detected at the same time in all monitoring circuits of
To identify the faulty monitored circuit.
It is possible to do it quickly and reliably.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の一実施例を適用してなる伝送装置の要
部を示すブロック回路構成図である。FIG. 1 is a block circuit configuration diagram showing a main part of a transmission device to which an embodiment of the present invention is applied.

【符号の説明】[Explanation of symbols]

１〜ｎ パッケージ １−１〜ｎ−１ 被監視回路 １−２〜ｎ−２ 監視回路 １−３〜ｎ−３ 再生回路 １−４〜ｎ−４ 故障検出結果出力端子 １−５ 監視制御回路 １−６ 信号入力端子 ｎ−５ 信号出力端子 1-n Package 1-1-n-1 Monitored circuit 1-2-n-2 Monitoring circuit 1-3-n-3 Reproducing circuit 1-4-n-4 Failure detection result output terminal 1-5 Monitoring control circuit 1-6 Signal input terminal n-5 Signal output terminal

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 伝送信号を入力する信号入力端子と、こ
の信号入力端子に供給される伝送信号を入力する第１の
パッケージと、この第１のパッケージから出力される伝
送信号を入力する第２のパッケージと、この第２のパッ
ケージと同様に構成され第２のパッケージから出力され
る伝送信号を入力して順次伝送する複数のパッケージ群
とからなる伝送システムの故障検出回路において、 前記第１のパッケージには、 前記信号入力端子から周期的に入力される伝送信号に監
視用制御信号を付加する監視制御回路と、 この監視制御用信号が付加された伝送信号を入力して通
過させる第１の被監視回路と、 この第１の被監視回路から出力される伝送信号からこれ
に付加されている監視制御用信号を抽出し、この抽出し
た監視制御用信号に基づいて前記第１の被監視回路の異
常検出を行い、これによって前記第１の被監視回路の異
常を検出した場合、前記伝送信号のｋ周期分に相当する
故障検出保護時間の計時を開始し、この故障検出保護時
間に達してもまだ異常が検出される場合に初めて前記第
１の被監視回路の故障と判定する第１の監視回路と、 前記第１の被監視回路から出力される伝送信号を入力
し、前記第１の監視回路で前記第１の被監視回路が故障
と判定された場合、次の周期の伝送信号からその伝送信
号に異常の生じた監視制御用信号に代えて正常な監視用
制御信号を付加して前記第２のパッケージに送出する第
１の再生回路とを備え、 前記第２のパッケージには、 前記第１のパッケージからの伝送信号を入力して通過さ
せる第２の被監視回路と、 この第２の被監視回路から出力される伝送信号からこれ
に付加されている監視制御用信号を抽出し、この抽出し
た監視制御用信号に基づいて前記第２の被監視回路の異
常検出を行う一方、これによって前記第２の被監視回路
の異常を検出した場合、前記伝送信号のｋ＋１周期分に
相当する故障検出保護時間の計時を開始し、この故障検
出保護時間に達してもまだ異常が検出される場合に初め
て前記第 ２の被監視回路の故障と判定する第２の監視回
路と 、前記第２の被監視回路から出力される伝送信号を入力
し、前記第２の監視回路で前記第２の被監視回路が故障
と判定された場合、次の周期の伝送信号からその伝送信
号に異常の生じた監視制御用信号に代えて正常な監視用
制御信号を付加して下流のパッケージに送出する第２の
再生回路とを備え、 前記複数のパッケージ群は下流になる程そのパッケージ
における故障検出保護時間が前記伝送信号の１周期分長
く設定されている ことを特徴とする故障検出回路。1. A signal input terminal for inputting a transmission signal, and
For inputting the transmission signal supplied to the signal input terminal of
Package and transmission output from this first package
A second package to enter the transmission number and this second package
Output from the second package, which is constructed similarly to the cage
Multiple package groups that input the transmission signal
In the failure detection circuit of the transmission system, the first package monitors the transmission signal periodically input from the signal input terminal.
The monitor control circuit to which the visual control signal is added and the transmission signal to which the monitor control signal is added are input and communicated.
The first monitored circuit to be passed and the transmission signal output from the first monitored circuit
The signal for supervisory control added to the
Of the first monitored circuit based on the monitoring control signal.
A constant detection is performed, and as a result, the first monitored circuit
When the constant is detected, it corresponds to k periods of the transmission signal.
Start the time measurement of the failure detection protection time, and
The above-mentioned
A first monitoring circuit for determining a failure of the first monitored circuit, and a transmission signal output from the first monitored circuit are input.
Then, the first monitored circuit fails in the first monitored circuit.
If it is determined, the transmission is transmitted from the transmission signal of the next cycle.
For normal monitoring instead of the signal for monitoring control in which an error has occurred
A control signal is added to the second package and the second package is transmitted.
1 reproduction circuit, and the transmission signal from the first package is input to and passed through the second package.
A second monitored circuit to be turned on and a transmission signal output from the second monitored circuit.
The signal for supervisory control added to the
Of the second monitored circuit based on the monitoring control signal.
While performing constant detection, this allows the second monitored circuit to be
When an abnormality of is detected, the transmission signal has k + 1 cycles.
Start time measurement of the corresponding failure detection protection time, and
Initially when abnormality is still detected even after the protection time is reached.
Second monitoring times is determined that a failure of the second of the monitored circuit Te
And a transmission signal output from the second monitored circuit
Then, the second monitored circuit fails in the second monitored circuit.
If it is determined, the transmission is transmitted from the transmission signal of the next cycle.
For normal monitoring instead of the signal for monitoring control in which an error has occurred
The second which adds a control signal and sends it to the downstream package
And a reproduction circuit, wherein the plurality of package groups are arranged in the downstream
Fault detection protection time is one cycle of the transmission signal
Failure detection circuit characterized by being set to a low level .
JP5271154A 1993-10-05 1993-10-05 Fault detection circuit Expired - Lifetime JP2531372B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5271154A JP2531372B2 (en) 1993-10-05 1993-10-05 Fault detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5271154A JP2531372B2 (en) 1993-10-05 1993-10-05 Fault detection circuit

Publications (2)

Publication Number Publication Date
JPH07107055A JPH07107055A (en) 1995-04-21
JP2531372B2 true JP2531372B2 (en) 1996-09-04

Family

ID=17496092

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5271154A Expired - Lifetime JP2531372B2 (en) 1993-10-05 1993-10-05 Fault detection circuit

Country Status (1)

Country Link
JP (1) JP2531372B2 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS588618B2 (en) * 1975-02-19 1983-02-16 日本電気株式会社 Denso Urono Pilot Warmer Warmer
JPS5369510A (en) * 1976-12-03 1978-06-21 Toshiba Corp Circuit supervisory system
JPS5499506A (en) * 1978-01-24 1979-08-06 Fujitsu Ltd Repeating monitor system
JPS57106251A (en) * 1980-12-22 1982-07-02 Fujitsu Ltd Monitor system

Also Published As

Publication number Publication date
JPH07107055A (en) 1995-04-21

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